A motorcycle accident Saturday has left a Griswold man seriously injured.  Pottawattamie County Sheriff’s Officials say 56 year old Micky Rabe of Griswold was taken to the Cass County Memorial Hospital and transferred by helicopter to Creighton University Medical Center in Omaha.  Authorities say Rabe was eastbound on Highway 92 riding a 2007 Harley Davidson motorcycle just east of 535th Street a little after two o’clock Saturday when he lost control and crashed through the ditch while trying to pass a slow moving vehicle.  Rabe was charged with not having a valid motorcycle license and failure to maintain control.